https://www.networkrail.co.uk/industry-and-commercial/research-development-and-technology/research-and-development-programme/innovative-modular-footbridge-desig

https://www.networkrail.co.uk/industry-and-commercial/research-development-and-technology/research-and-development-programme/innovative-modular-footbridge-design/ https://www.networkrail.co.uk/industry-and-commercial/resear... contains a whole bunch more about this; see especially the "More information about the footbridge's development" fold-outs at the bottom